These Gyms are made from construction grade schedule 40 PVC. All the perches are scored for your birds perching pleasure. Made with continuos link chain, Stainless Steel and heavy duty plastic. The toys are included and are reloadable. Everything spins. There are no stationary parts. They are indestructible and washable. All dimensions are approximate, and can be adjusted to your liking. The Kitchen Sink Can be hung from the ceiling with an extender. This size for Conures, Cockateils, etc